Question

la ex 11 primele a,b,d,e va rog

Answer 1

11.
a) (5/6+3/4)*24/19
=(10/12+9/12)*24/19
=19/12*24/19
=2

b)(1/6+7/9)*18/17
=(3/18+14/18)*18/17
=17/18*18/17
=1

d)(5/12-3/18)*4
=(15/36-6/36)*4
=9/36*4
=1

e)(11/45-1/30)*18/19
=(22/90-3/90)*18/19
=19/90*18/19
=1/5